PLEASE HELP

my boyfriend broke up with me 5 days before our 2 month because he “didn’t trust me” and he claims that I was talking to a guy I wasn’t talking to. i miss him more than anything and when we were dating and caught eachother staring at eachother and used to make stupid faces and say “what” i was staring at him in class a couple days after he broke up with me and he tried to play say “what” like we did when we were dating. anyways, my friend overheard him talking to his best friend who’s a girl (and also his ex) saying he missed me and he didn’t know what to do. i miss him more than anything and I proved there’s no reason not to trust me but idk if I should see if he comes back to me or tell him that I miss him first. (btw he said he might date me again if I proved he could trust me). i’m sorry this is so long but PLEASE HELP! he means the world to me